I went to a Flat Earth convention. Here's what separates science deniers from scientists.

very day in the media we see once-unthinkable science headlines. More than seven hundred cases of measles across 22 states in the U.S., largely due to vaccine deniers. Climate change legislation stalled in the U.S. Senate—due mainly to partisan politicians who routinely confuse climate and weather—even as scientists tell us that we have only until 2030 to cut worldwide carbon emissions by half, then drop them to zero by 2050. And, in one of the most incredible developments of my lifetime, the Flat Earth movement is on the rise.